Straight bar knitting machine



Dec. 15,1942, :5. WILDERS El'AL STRAIGHT-BAR KNITTING MACHINE Filed ma29; 1942 .11 Sheets-Sheet 1 FIG 2.

FIG.

Dec. 15, 1942. w p s 2,305,335

STRAIGHT BAR KNITTING MACHINE Filed'llay 29, 1942 11 Sheets-Sheet 2 0 NIEIVTEQJ M" aqfibw l 4 Dec. 15, 1942. G. WILDERS ETAL STRAIGHT BARKNITTING MACHINE Filed May 29, 1942 11 Sheets-Shut 4 IIVVEIVTO/PS Z v [aLn/); 4

ATTOR EX Dec. 15,1942.

WILDERS EIAL STRAIGHT BAR KNITTING MACHINE Filed May 29, 1942 1 1Sheets-Sheet 5 Dec. 15, .1942. s.' WILDERS EI'AL 2,305,335

STRAIGHT BAR KNITTING MACHINE Filed'May 29, 1942 ll Sheets-Sheet 6 wi WQH WQ\ Dec. 15; 1942. G. WILDERS Em 2,305,335

STRAIGHT BAR KNITTING MACHINE Filed May 29, 1942 11 Sheets-Sheet '7 20-1lsj FIG. /8.

' INVENTORS Aime/v57 ca. WILDERS ETAL STRAIGHT BAR KNITTING MACHINE Dec.15,1942.

1i Sheefis-Sheet a F'iled May 29, 1942 F/G. l9.

N [N70 5 ZMM Dec. 15, 1942,

G. WILDERS ETAL STRAIGHT BAR KNITTING MACHINE 11 Sheets-Sheet 9 FiledMay 29, 1942 MN 7 mm A from E m8 mm Q N M E \mm m3 m9 Ex Dec. 15, 1942.G. WILDERS EI'AL STRAIGHT BAR KNITTIQGMAGHIN Filed May 29, 1942 1lSheets-Sheet 11 lAlVE/VTORS 1 rim/v5 bar, a driving pinion Patented Dec.15, 1942 7 2,305,335 STRAIGHT BAR KNITTING MACHINE- George Wilder's,Kegworth, and William Gordon MacDonald, Loug hborough, England,assignors to William. Cotton Limited, Loughborough,

England Application May 29, 1942, Serial No. 445,044 In Great BritainApril 25, 1941 15 Claims.

This invention is for improvements in and relating to Cottons patent orother straight bar knitting machine having automatic welt turninapparatus, and an object of the invention is to provide simple means ofa mechanical nature whereby the requisite movements are imparted to thewelt bar. The invention is particularly but not exclusively applicableto the straight bar knitting machine according to British patents No.505,222 or No. 501,306. g A v The present invention provides, in aCottonfs patent or other straight bar knitting machine having automaticwelt turning apparatus comprising a welt bar equipped with weltinginstruments or hooks movable towards the needles to receive thread orthread kinks of an initial welt course, movable away from the needlesduring the production of at least a portion of the welt, and movabletowards the needles to offer to them the initial welt course held by thewelting instruments, operating mechanism for effecting the aforesaidmovements of the welt bar towards the needles, comprising a rack formoving the welt forthe rack, a rocking quadrant for rotating the pinion,cam means on the main cam shaft for rocking the quadrant throughthe'medium of a truck or other cam follower, and means foreffectingrelative shogging or displacement of said cam means andfollower to bring them into and out of co-operative register. Preferablythe cam means is arranged to rock the quadrant in one direction andspring means is provided for moving it in the reverse direction underthe control of the cam means. According to an important subsidiaryfeature of the invention the cam means comprises two cams, for movingthe welt bar at the commencement and at the termination respectively ofthe welt,

and the truck is arranged to be acted on by each cam in turn (theexpression moving being employed in a broad sense to include the controlof the movements of the bar, as for example when a truck descends-aflank of the cam under spring or other influence and the resultantmovement of the .bar is determined by the configuration of the camflank).

The foregoing and other features of the invention set out in theappended claims are incorporated in the constructions which will now bedescribed as an example with reference to the accompanying drawings, inwhich Figures 113 are diagrams illustrating the various stages in theproduction of a turned welt.

Figures 14 and 15 together constitute across .section showing therelevant parts of a Cottons anism.

patent knitting machine according to this invention.

Figure 16 is a sectional elevation, on a larger scale, showing the weltbar and. associated mech- Figure l'I-is a plan thereof.

Figure 18 is an elevation showing the pressing points hereinafterreferred to. I

Figures19, 20 and21 are, respectively, cross sections on the lines I9,26 and 2| of Fig. 18."

Figure 22 is an elevation, and V Figure 23 a sectional plan of 'partofthe operating mechanism for the pressing points.

Figure 24 is a diagrammatic elevation of the disc shaft hereinafterreferred to.

Figure 25 is an elevational'view'of part of the mechanism shown in Fig.14- as'seen from the left of said figure, and'illustrating thedisc'shaft control and racking mechanism, while Figure 26 is ase'ctional-elevational View of mechanism included in Figs. 14 and 24,taken approximately on the plane indicated by the line 26-45 of thelatter figure, and illustrating, as a representative example, the meanswhereby selected cam trucks ar e shogged;

Figure 27 is a detail in plan of mechanism in cluded in Figures 15 and26, and

Figure 28 shows the cams for moving and controlling the movementsof thewelt quadrant.

' Turning first to Figs. 1-13, the thread of the initial welt course 1of a stocking welt is laid, sunk and divided on the needles in in theusual manner, but the knocking-over bits 13 are lowered before dividingtakes place and welting instruments ll, one for each needle space, areinserted below the sinkers I2 and above the knocking-over bits [3. Theconstruction of these welt instruments is clearly shown; each of themhas a hook or recess H. The course I having been 40 divided the needlesare lowered (Fig. 2) and the sinkers l2 retracted (Fig.3) so that everysinker loop descends into the hook I l' of the appropriate weltinginstruments, the sinkers are then again advanced (Fig. 4) and theneedles raised. At

least one draw (and preferably two takes place without yarn and duringsuch draw or draws every second needle descends and is pressed by apresser bit l5 (Fig. 5) so that on further descent of the needles everysecond needle kink is cast off to extend between two successive welthooks ll, Fig. 6. Knitting of the welt thereafter proceeds in the usualmanner (Fig. 7) the welt hooksbeing retracted until at an appropriatestage the welt rod 120 is inserted above the welt fabric F and thetake-up straps attached to it so that a fold of the fabric is drawnbelow the welt hooks II as shown in the chain dotted lines (Fig. 8) andthe initial course is drawn to the back of the hooks I I. When therequisite length of fabric has been knitted the welting instruments IIare again advanced to offer the needle kinks held by them to betransfixed by the needles. In order to facilitate this the presserinstruments I are again brought into operation to press every secondneedle, from which a needle kink was originally cast off, in the forwarddirection (i. e., towards the front of' the machine) as shown in Figs. 9and 0, so that when the needles thereafter rise (Fig. 11) they passthrough the needle kinks held by pairs of welting instruments withoutdifficulty. Welting instruments II are then withdrawn (Fig. 12) andknitting proceeds as in Fig. 13, take-up being effected through the weltrod I20.

The welting instruments I I, which extend horizontally, are carried by awelt bar I5 (identified by the reference numeral 3 in the specificationsof the aforesaid British patents) there being one such bar for eachdivision in the case of a multidivision machine. Each end of the saidwelt bar is mounted, to slide in a horizontal plane to and from theneedles, on a guide I! (Figs. 14, 15 and 16) supported on frame memberI2I. Each of the guides is of U or channel shape in section and theupper margins of its side walls are flanged outwards as at II' to beembraced by suitable parts on a box-like member I8 on which the adjacentend of the welt bar I6 is mounted.

The welt bar is propelled towards the needles by rack and pinionmechanism best shown in Figs. 15, 16 and 17. There is a rocking quadranti9 pivoted at 20 and having a truck- 2| which is urged by a tensionspring 22 to engage with cams on the main cam shaft 23, the said truckbeing shogged from an idle position into register with one or other oftwo cams and vice versa by mechanism hereinafter described. The upperend of this quadrant is a toothed part I9 which engages with a pinion23' on a shaft 24. For each end of a welt bar, this shaft carries twoother pinions 25 (Figs. 16 and 17) meshing with racks 26 formed at theunderside of a boxlike member 21 slidable along the adjacent guide if(as it may here be pointed out that the pinion that meshes with thetoothed quadrant may also mesh with the rack). The box member 21 carriesa depending block 28 between the side walls of the guide II, which blockin turn supports a forwardly projectingpin 29. The front end of thelatter is slidably engaged in a further block depending from a boxmember 3I likewise slidable along the guide I7, and between the twodepending blocks 28 and 30 the pin 29 is encircled by a compressionspring 32. Therefore when the quadrant I9 is swung towards the front ofthe machine the welt bar is resiliently propelled towards the needlesthrough the medium of box members 27, 3|, with their blocks 28, 30 andthe compression springs 32, but when the quadrant i9 is moved in theother direction the box 2'! and block 28 are retired from the needlesdrawing with them the block 30 and box 3I through the medium of hookedcoupling members 33, which boxes 21, 3I therefore recede from the weltbar IS, the latter at this stage being held forward by the engagementcourse of yarn with the welt hooks. The welt bar is, however,resilientlybiased away from the line of needles by welt straps 34.

The parts 36 and 31 are for positioning the welt bar and for holding itrigid during the production of the first course of the welt.

The various operations of the welt turning mechanism are controlled fromdiscs mounted on lever 48. The clawker is therefore free to entions isthus brought into gage a rack wheel 49. The clawker 41 is constantlyracked by means of a truck 50 mounted on a truck lever 5| and operatedby cam 52 on the main cam shaft 23. When the rod 44 is pushed towardsthe back of the machine a collar 54 thereon (Fig. 25) is engaged bypivoted catch 53, until at the end of the first rack an ad- Justablestud 55 on the truck lever 5| strikes and rocks a bell-crank-lever 56whereby the hooked catch 53 is'disengaged so that the bluff 45 returnsto blufling position under the influence of compression spring 44 (Fig.25) on rod 44. During this first rack, however, the rack wheel 49 ismoved sufiiciently to displace a blufling member 49a which is adjustablysecured to it from beneath a second clawker 41' which moves with thefirst clawker 41. Therefore, the disc shaft 40 continues to be rackedround one rack at each revolution of the main cam shaft 23 until theblufling member 4911 again passes beneath the pawl 47.

The automatic control of the welting operaoperation, the discs on toeffect this control into and out of registhe disc shaft 40 serving byshogging various trucks ter with cams on the main cam shaft 23 throughthe medium of two groups of control rods, which groups are bracketed at60 and GI in Figs. 14, 15, 25 and 26. Referring to Figs. 14 and 24, thediscs (indicated generally at I40) operate on a series of levers,pivoted at I23, which are indicated by the general bracket 63; certainof the latter are in turn connected by rods each to one of a series ofbell-crank-levers 64 while others are connected to locking fingers I2hereinafter referred to. In Figure 24 ten discs I40 are shown on thedisc shaft 40. Reading from left to right the discs and the operationswhich they control are as follows:

Disc I400 controls a locking finger hereinafter referred to, in thecontrol mechanism for the advance of the knocking over bits I3;

Disc I 4021 controls a like finger in the control mechanism for the liftof said bits;

Disc I40e controls a carrier selector cam for the production of ringlessfabric;

Disc I400 controls the advance of the knocking over bits;

Disc I401) controls the lift of said bits;

Disc I40a controls the pressing movements of the needle bar;

Disc I40d controls the pressing points I5;

Disc I401 controls the welt strap;

Disc I40a' controls a locking finger in the control mechanism for theneedle pressing.

Disc I40h controls the movements of the welt bar.

The levers 64 (Figs. 24 and 26) move the rods of group 60 and thelatter, through the medium of forks, shog trucks. The rods 60a, 60b, 600are respectively concerned with the control of the needle pressing, thelift of the knock-over bits,

and the advance of the latter; they shog trucks indicated generally at65 (Fig. 14) into and out of register with cams on the main cam shaft23. These trucks 65 are carried on truck levers 66 so that the latterare thereby rocked and, through connections 61, rock bell-crank-levers68 (Fig. 15) to move rods (ila,'6lb and 610 of group N. These rods inturn shog trucks of which that indicated at 621) in Fig. 26. is anexample. The typical mechanism shown in that figure comes intooperation, before the initial welt course has been divided (e. g., whilesaid course is being laid) and before the welting instruments II areadvanced to the needles, to lower the knockingover bits I3 carried byknocking-over, bar 57. The up and down movements of the knockingover barare determined by aftruck lever 58 mounted on a rock shaft 59 andcarrying'a truck 6217 for engagement with a suitable cam on the main camshaft 23. This truck is shogged into and out of register with its cam bypower derived from the main cam shaft but the shogging is controlled bythe rear disc shaft or control shaft 40. One of the discs Mllb, Figs. 24and 26 thereon serves to rock a lever 631) which operates throughbell-crank-lever 64b and control rod 601) of the group 66 to shog thetruck 65b, carried by a truck lever 661) into register with a cam on themain cam shaft 23. The truck lever 66b is therefore rocked and by aconnection 671) rocks bell-crank-lever 681) which in turn serves to movecontrol rod (ill) of the group ill and to shog the knocking-over truck62b. The reverse movement of the rod 61b (to remove the truck from thecam) may be delayed until any convenient period in the production of acourse by mechanism illustrated in Figs. 14 and 27. The bell-crank-lever68b is adapted to move the rod Bib against the action of a compressionspring 69 located between a suitable abutment and a fixed collar on saidrod. This movement carries a collar N (Fig. 27), on the rod, past alocking finger 321) which is controlled directly from the disc Mlib ondisc shaft 4! by a rod 13b and one of the groups of levers 63.Therefore, the finger 121) being engaged with collar II, the rod 6lbcannot return under the action of the spring 69 until the finger hasbeen lifted. Similar collars H and springs 69 are provided on rods Maand 610, so that these rods are also controlled by a finger l2. Thereare three of these fingers l2 and the mechanism first described withrelation to finger 72b is typical of the mechanisms for the other twofingers which derive their movements from disc Mile and Mild.

The welt bar it is new advanced to the needles by the rocking quadrantill, the truck 2! being for this purpose shcgged into register with theappropriate cam I22 (Fig. 28) by the fork 15 (Fig. 15) and rod Six ofgroup and is subsequently shcgged back into the inoperative position.The rod Elm is controlled directly from the disc Mfih on disc shaft 40by bell-crank-lever 16, connection 11 (Figs. 14 and 24) and lever 18which latter is pivoted at I23. It will be understood that the quadrantI9 moves to the left under the influence of spring. 22 after the truck2! has been shogged to its inoperative position, so that the members 21and 3| move away from the welt bar 16, but the latter is drawn afterthem progresing off of every second needle as shown in Figs. 5 V

and 6. The carrier bars are grouped under the" bracket 19 in Fig. 14 andare selected by a selector moved by levers 8| carrying a rod 82. An arm8| connected to one of these levers is provided with a pin 83 which maybe engaged in either of two slots 84a or 84b in a member which ispivotally carried on the top of a vertical rod 85. The member 84 isturned by hand and the pin 83 is engaged in the lower slot 8 la thereof.This restricts the selector 8!] to positions equivalent to the threecarrier bars 19a, 19b and 190 whereof the bars 19a and 191) are notprovided with lugs for engagement by the selector '80 and are thereforeincapable of being traversed. The up and down movement of the rod 85 iscontrolled by a carrier selecting cam 86 and the neutral positionequivalent to bar 19a is selected for the aforesaid course. All theneedles are prevented from pressing on the usual presser, theypressertruck being shogged on to an additional cam for this purpose. Thepresser truck is controlled from disc Mod by shogging one of the trucks65 (Fig. 26) and the said truck is controlled by rods 60a, (Na, .andconnections similar to those by which rod 60b is moved. Therefore, Fig.26 is an example of the presser control mechanism.

The auxiliary pressing points l5 are now raised to meet theneedles intheir descent (Figs. 5 and 6) by shogging the presser point truck 87(Fig. 15) from an inoperative position into register with a cam by meansof rod 69d (Fig. 14) which rod is itself moved by controls (includingdisc 140d) similar to those of rod 60b. The truck 81 is carried by lever88 to which is coupled a vertical rod 89 and a cam slide 90 (Figs. 14and 19) which operates in a manner hereinafter described. The presserpoints l5 are carried by a bar, indicated generally at 95, which issecured to the knocking-over bar 51 by members (see Figs. 18 and 20) andis slidably guided on the bar 51 by-slide members 91. It is arranged tobe raised thereon by means of a bell-crank-lever 98 secured to theknocking-over bar 51 and cooperating with an adjustable tappet I!!!)itself carried by a bar HH slidable horizontally in the frame member 99.Slide 90 is cut and bar llll is constructed as shown in Figs. 22 and 23so that when the slide 90 is lowered the bar llll is moved horizontallyto cause the pressers I5 to be raised.

With the lowering and raising of the needles shown in Figs. 5 and 6 theinitial course has been transferred to the hooks II, but it will beremembered that the two draws or courses following the initial courseare completed without yarn to permit the needles to be pressed by thepoints 15' and the loops cast off. For the second of these two idlecourses a position equivalent to carrier bar 191) (Fig. 14) is selected,the press-v ing points 15 are lowered and their truck 8! (Fig.15)shcgged back, the needle bar pressing truck; is shcgged back and theknocking-over bits 13 are restored to the operative position by shoggingtheir truck, the movements of these trucks having hitherto been delayedby fingers '12. At the end-of the course the selector 8!] is stopped ina position in which the welt carrier bar 19c (the carrier of which isthreaded up with yarn) is selected. The carrier selector cam 86 (Fig.14) is stopped from rotation by disengaging its racking pawl Hi2 fromits rack wheel I03. This is effected when'one (63c) of the levers 63,connected to lever mechanism 59 bylink 38 '(Figs. 14 and24), drops off astud on the appropriate disc Mile and allows a pin I04 and a /7 rod I05to slide under the influence of a spring and to disengage the pawl l02.This pawl I 02 is normally racked by any appropriate mechanism, such forexample as that disclosed in British patent specification No. 483,040.

When the welt bar I6 has retired to a sufiicient extent the welt rod I20is then slipped into the hooks I06 (Figs. 14 and 16) provided for it ateach end of the needle section and the drawing off straps H6, which areconnected to the drawoff roller I81 and have hitherto been resting onthe anchor plates I08, are connected to the ends of said bar I6 byswinging said plates upwards, and the draw-off weight is applied to thedrawofi rollers. The fabric is drawn off by the joint action of the weltstraps 34 and the drawing ofi straps II6 until the welt bar I6 reachesthebox 3| which has been retired by the quadrant I9 to its maximumextent. Thereafter the draw-oil roller I01 and the draw-off straps actalone, a loop of the fabric being drawn under the welting instruments IIand the welt bar I6, as shown in chain dotted lines in Fig. 8.

In order to eiiect the re-transfer of the initial course of the weltfabric to the needles, the disc shaft 40 is again started (havingstopped some time previously) by handle 4I. Thereafter the needlepresser truck is shogged by rod Gila to prevent the needles pressing atthe usual presser; the yarn selector'cam 8B is started so that the nextdraw is made without yarn with the selector at a position'equivalent tocarrier bar 1917, and the'knocking-over bits I3 are lowered by theoperation of control rods 69?) and 6Ib and are subsequently advanced bythe operation of control rods 60c and 6Ic. The truck 2I for the weltquadrant I9 is shogged by rod BIzc so that the welt bar It is advancedto the needles While the latter are at the knocking over position shownin Figs. 10 and 11. The needles rise to penetrate the loops as in Figs.9, 10, and 11, and as they rise the pressing points I (which areadvanced with the knocking-over bits I3 and may, if de sired, becontrolled by rod 60d to rise to a level substantially that of saidbits) deflect alternate needles (Figs. 9 and to ensure an efficienttransfer. The welting instruments II are retracted (Figs. 11 and 12)simultaneously with the raising of the needles when the latter havetransfixed the loops, and as they retract a momentary slackening of thetension of the welt straps 34 r is effected. To do so, one of the trucks65, carried by truck lever I09 (Figs. 14 and 15) is shogged by discI4llf and rod 60 from one cam to another; the truck lever is depressedand pulls rod IIli which is connected to pawl-carrying lever I I I. Thelatter therefore makes a limited rocking movement about the axis of theshaft II2 (Fig. 16) carrying the winding rollers II3 for the welt straps34 and its pawl II4 racks a ratchet I I5 on said shaft to turn the saidrollers II3 to slack off the straps 34. The said rollers I l3 are biasedin the winding direction by weights. The next draw takes place withoutyarn (the selector being at a position equivalent to carrier bar 79a) toreturn the machine controls to normal, the carrier selection mechanismbeing then set to operate on carrier bars I9 other than the bars 19a,19b, 190. For example in each of a recurrent series of three successivecourses a different bar may be employed as in the production of theso-called ringless hose.

The cams for the welt quadrant I9 are illustrated in Fig. 28. There aretwo shaped cams I22, and I22a, and the welt truck 2| is shogged axiallyto bring it into register with one or other of the-saidtwo cams I22,I22a on the main cam shaft 23 and also into a third, inoperative,position in which it does not register with either of them. The cam I22is employed to move the welt bar IE towards the needles to take theinitial welt course and then away from the needles, and the other camI22a is employed to move the welt bar towards the needles to restore theinitial welt course at the completion of the welt. The cams areappropriately shaped and set on the cam shaft as to give the requiredtiming, and the spring 22 (Fig. 15) is provided for holding the truck 2|against the periphery of the cams.

The design of the shaped cams I22, I22a is such that the welt bar I6 iscaused to make a movement towards and away from the needles in acomplete revolution of the main cam shaft 23. The automatic productionand turning of a welt necessitates the following movements of the weltbar: (a) towards the needles to receive the initial course, (b) awayfrom the needles during the production of the first few courses of thewelt, (0) towards the needles at the completion of the welt to offer theinitial course to them, and (01) away from the needles to an inoperativeposition after the welt has been turned. Since it is necessary that thewelt bar should remain stationary between movements (b) and (0) whilethe welt fabric is being knitted and taken up by the usual welt rod I20and take-up straps II6, it will be obvious that not only must the truck21 be shogged into register with the appropriate cam at the commencementof the welt turning operations and out of register at their termination,but that it must also be shogged from cam 22 to the inoperative positionbefore movement (1;) and from the inoperative position to the other camI22a prior to movement (0).

In order to facilitate shogging, the quadrant I9 is provided with anadjustable screw I25 which comes into contact with any suitable stop,such for example as one of the shafts I24 of the machine, and keeps thetruck 2I just clear of the low portions of the cam peripheries.

It will be obvious that the disc shaft may be started automatically, byany suitable control or chain, instead of or in addition to the handlever 4|.

We claim:

1. In a Cottons patent or other straight bar knitting machine havingautomatic welt turning apparatus comprising a Welt bar equipped withwelting instruments or hooks movable towards the needles to receivethread or thread kinks of an initial welt course, movable away from theneedles during the production of at least a portion of the welt, andmovable towards the needles to offer to them the initial welt courseheld by the welting instruments; operating mechanism for effecting theaforesaid movements of the welt bar towards the needles, comprising arack for moving the welt bar, a driving pinion for the rack, a rockingquadrant for rotating the pinion, a cam follower associated with thequadrant, cam means for rocking the quadrant through the medium of thefollower, and means for eifecting relative shogging or displacement ofsaid cam means and follower to bring them into an out of co-operativeregister,

2. A machine according to claim 1, having the cam means for rocking thequadrant in one direction and spring means for rocking it in the reversedirection.

3. A machine according to claim 1, wherein the cam means comprises twocams for acting on the follower; in turni'one for moving the welti rockthe quadrant in one direction to advance bar atthe commencementand theother at the termination of, the welt. e

.4. In a Cottons patent or other straight bar knitting machine havingautomatic welt turning apparatus comprising a welt bar equipped withvmoving the welt bar, a driving'pinion forthe rack, a rocking quadrantfor rotating the pinion,

a cam follower associated with the quadrant, two main shaft cams foracting on the follower to rock the quadrant to advance the weltv bar,to-

wards the needles, one cam for advancing thej welt bar to the needles totake the initial course and the other to advance the welt bar to theneedles in the restoration of the welt, means for retracting the weltbar from the needles, and shogging means for effecting relative shoggingbetween the follower and cams.

a course, a second main shaft cam for acting on the follower to rock thequadrant in said direction to the welt bar to the needles to take theinitial advance the welt bar to the needles in the restoration of thewelt and to control the subsequent retirement of'the welt bar, means,otherthan the quadrant, for retiringfthewelt bar from the equipped withwelting instruments, movable to- 5. In a Cottons patent or otherstraight bar rack, a rocking quadrant for rotating the pinion,

a cam follower associated with the quadrant, a main shaft cam for actingon the follower to rock the quadrant in one direction to advance thewelt bar to the needles to take the initial course, a second main shaftcam for acting on the follower to rock the quadrant in said direction toadvance the welt bar to the needles in the restoration of the welt andto control the subsequent retirement of thewelt bar, means, other thanthe quadrant, for retiring the welt bar from the needles, and shoggingmeans for effecting relative sh-ogging between the follower and cams tobring the follower and first cam into register to advance the welt barto the needles and-out of register prior to a second rotation of the camand to bring the follower and second cam into register to advance thewelt bar and subsequently out of register,

6. In a Cottons patent or other straight bar knitting machine havingautomatic welt turning apparatus comprising a welt bar equipped withwelting instruments or'hooks movable towards the needles to receivethread or thread kinks of an initial welt course, movable away from theneedles during the production of at least a portion of the Welt, andmovable towards the needles to offer tothem the initial welt course heldby the welting instruments; operating mechanism for effecting theaforesaid movements of the welt bar towards the needles, comprising arack for moving the welt bar, a driving pinion for the rack, a rockingquadrant for rotating the pinion, a cam follower associated with thequadrant, a main shaft cam for acting on the follower to needles, and'shogging means for efiecting rela' ;tive shogging between the followerand cams to bring the follower and first cam into register to advancethe welt bar to the needles and out'of register prior to a secondrotation of the cam and to bring the follower and second cam intoregister to advance the welt bar'and out of register after the weltbarhas retired from the needles under the control of said cam,

7; Ina Cottonspatent or other straight bar knitting machine havingneedles and automatic welt turning apparatus comprising a welt bar,

wards the needles to receive thread or thread kinks of an initial weltcourse, away from the needles during the production of at least aportion of the welt, and towards the needles to offer to them theinitial course held by the instruments; the combination of a rack,movable separately'from the welt bar, for advancing the 'bar I to theneedles, a rocking quadrant for 'movin the rack towards'the needles toadvance the Welt bar, a cam follower associated withthe quadrant, cammeans for acting on the follower to rock the quadrant and to move therack, shogging means for effecting relative shogging between the fol-;lower and cam means to bring them into and out of co-operatingregister, and a take-up for retiring the welt bar from the needlesindependently of the movement of the rack.

8. In a Cottons patent or other straight bar knitting machine havingneedles and automatic welt-turning apparatus comprising a welt bar, witha welting instrument thereon for each needle space, movable towards theneedles for the instruments to receive needle kinks of an initialcourse, away from the needles'during the production of at least aportion of the welt, and towards the needles to offer to them theinitial course held by the instruments, and means for advancing the weltbar to the needles, a rocking quadrant for moving the rack, a camfollower associated with the quadrant, cam means for acting on thefollower to rock the quadrant to advance the welt bar to the, needlesatthe commencement of the welt and at the termination of the welt,shogging means for effecting relative shogging between the follower andcam means to bring-them into and out of co-operating register, timingmeans for rendering the release means operative when the welt bar hasbeen advanced by the cam means at the commencement of the welt, andmeans other than the quadrant for drawing the welt bar away from theneedles after the initial course has been taken by the instruments.

9. In a Cottons patent or other straight bar knitting machine havingneedles and automatic welt-turning apparatus comprising a welt bar, witha welting instrument thereon for each needle space, movable towards theneedles for the instruments to receive needle kinks of an initialcourse, away from the needles during the production of at least aportion of the welt, and.

towards the needles to offer to them the initial course held by theinstruments, and needle pressing means for releasing from every secondneedle the needle kinks of the initial comes so that, prior to theproduction of the next course of the welt, the thread of each such kinkextends between two successive instruments; the combination of a rack,movable separately from the welt bar, for advancing the welt bar to theneedles, a rocking quadrant for moving the rack, a cam followerassociated with the quadrant, cam means for acting on the follower torock the quadrant to advance the welt bar to the needles at thecommencement of the welt and at the termination of the welt, shoggingmeans for effecting relative shogging between the follower and cam meansto bring them into and out of co-opera-ting register, timing means forrendering the pressing means operative when the welt bar has beenadvanced by the cam means at the commencement of the welt, and meansother than the quadrant for drawing the welt bar away from the needlesafter the initial course has been taken by the instruments.

10. In the combination claimed in claim 1, a

rack at each end of the welt bar, a pinion shaft,

and two quadrant-driven pinions, fixed to said shaft, each engaging oneof the racks,

11. A Cottons patent or other straight bar knitting machine, having weltturning apparatus comprising a welt bar equipped with welting Iinstruments, which welt bar is movable towards the needles at thecommencement of the welt to receive thread of an initial welt course onthe instruments, away from the needles during the production of at leasta portion of the welt to take up the fabric under production, towardsthe needles at the termination of the welt to offer the initial weltcourse to the needles, and finally away from. the needles, incombination with a rack separate from, and movable from the needlesindependently of, the welt bar for propelling the bar towards theneedles, a pi ion engaging said rack, a rocking quadrant for rotatingthe pinion, a cam on the main cam shaft for rocking the quadrant topropel the rack towards the needles, spring means for rocking thequadrant to retire the rack from the needles, and welt straps;

for drawing the welt bar away from the needles.

on the welt straps as the needles transfix the 7 initial course in itsrestoration to them.

13. In a Cottons patent or other straight bar knitting machine havingneedles and automatic welt turning apparatus comprising a welt bar,equipped with welting instruments, movable towards the needles toreceive thread or thread kinks of an initial welt course, away from theneedles during the production of at least a portion of the welt, andtowards the needles to offer to them the initial course held by theinstruments; the combination of a guide for each end of the welt bar inits movements, members, separate from the welt bar, mounted on theguides for propelling the welt bar towards the needles but movable awayfrom the needles independently of the welt bar, at least one rackconnected to the said members, a rocking quadrant driving said rack andmembers, a cam follower associated with the quadrant, cam means forengaging the follower to rock, the rack, shogging means for effectingrelative shogging between the follower and cam means to bring them intoand out of co-operative register, and means other than the said membersand rack for moving the welt bar along the guides away from the needles.

14. In a Cottons patent or other straight bar knitting machine havingautomatic welt turning apparatus comprising a welt-bar equipped withwelting instruments or hooks movable towards the needles to receivethread or thread kinks of an initial welt course, movable away from theneedles during the production of at least a portion of the welt, andmovable towards the needles to offer to them the initial welt courseheld by the welting instruments; operating mechanism for the welt bar,comprising a rack for moving the welt bar, a rocking quadrant for movingthe rack, a cam follower associated with the quadrant, cam means forrocking the quadrant through the medium of the follower, and means ,foreffecting relative shogging or displacement of said cam means andfollower to bring them into and out of co-operative register.

15. In a Cottons patent or other straight bar knitting machine havingautomatic welt turning apparatus comprising a welt bar equipped withwelting instruments or hooks movable towards the needles to receivethread or thread kinks of an initial welt course, movable away from theneedles during the production of at least a portion of the welt, andmovable towards the needles to offer to them the initial welt courseheld by the weltin instruments; operating mechanism for effecting theaforesaid movements of the welt bar towards the needles, comprising arack for moving the welt bar, a driving pinion for the rack, a rockingquadrant for rotating the pinion, a. cam follower associated with thequadrant, two main-shaft cams for co-acting with the follower andquadrant, one cam in the advance of the welt bar to the needle to takethe initial course and the other in the advance of the bar to theneedles to offer to them the initial welt course held by the weltinginstruments, means for retracting the welt bar from the needles, andshogging means for effecting relative shogging between the follower andcams.

GEORGE WILDERS. WILLIAM G. MACDONALD.

